How to view OTF fonts?
I found this on the blendernation site:


  Blender supports all the major fonts supported by the freetype library, including PostScript Type1 and Type3, TrueType, and OpenType. However fancy OpenType features such as automatic ligatures aren't supported and it seems Blender doesn't even support things like built-in kerning metrics either.


So, you may find an .OTF that works. But if you're pressed for time, convert it to .TTF, or one of the other abovementioned, with e.g. http://www.freefontconverter.com